如何在 RowsFragment 中使行的标题始终可见

Question

这是我现在拥有的。

只是我的 RowsFragment 是这样的，

public static class SampleFragmentB extends RowsFragment {
        private final ArrayObjectAdapter mRowsAdapter;

        public SampleFragmentB() {
            mRowsAdapter = new ArrayObjectAdapter(new ShadowRowPresenterSelector());

            setAdapter(mRowsAdapter);
            setOnItemViewClickedListener(new OnItemViewClickedListener() {
                @Override
                public void onItemClicked(
                        Presenter.ViewHolder itemViewHolder,
                        Object item,
                        RowPresenter.ViewHolder rowViewHolder,
                        Row row) {
                    Toast.makeText(getActivity(), "Implement click handler", Toast.LENGTH_SHORT)
                            .show();
                }
            });
        }

        @Override
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            createRows();
            getMainFragmentAdapter().getFragmentHost().notifyDataReady(getMainFragmentAdapter());
        }

        private void createRows() {
                String json = Utils.inputStreamToString(getResources().openRawResource(
                        R.raw.page_row_example));
                CardRow[] rows = new Gson().fromJson(json, CardRow[].class);
                for (CardRow row : rows) {
                    mRowsAdapter.add(createCardRow(row));
                }
        }

        private Row createCardRow(CardRow cardRow) {
            PresenterSelector presenterSelector = new CardPresenterSelector(getActivity());
            ArrayObjectAdapter adapter = new ArrayObjectAdapter(presenterSelector);
            for (Card card : cardRow.getCards()) {
                adapter.add(card);
            }

            HeaderItem headerItem = new HeaderItem(cardRow.getTitle());
            return new CardListRow(headerItem, adapter, cardRow);
        }
    }

这正是我想做的，

所以我想让每一行的标题始终可见，而无需选择或关注 RowsFragment。我正在使用leanback v24 在每个标题项中添加多行。

Answer 1

您可能需要查看适用于 Android TV 的 Sofa 库，该库通过提供一组更强大的功能扩展了 Leanback library 功能。在BrowseSupportFragment 中，mRowsFragment.setExpand 应该是true。补充参考：how to always show headers in RowsFragment